package com.dynamicthreadpool.spi.extension;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * SPI扩展点注解
 * 从Dubbo 2.7版本提取
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE})
public @interface SPI {

    /**
     * 默认扩展实现名称
     */
    String value() default "";
}
